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Code Releases Activity

Workaround to support "If-Modified-Since" conditional HTTP requests on web servers supporting GZIP compression, also enabling GZIP compression support on Android 2.1 and 2.2.

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This commit is contained in:
Christophe Beyls 2015-05-30 23:51:29 +02:00
parent b1d823d245
commit 56fea42162
1 changed files with 27 additions and 21 deletions
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48
app/src/main/java/be/digitalia/fosdem/utils/HttpUtils.java
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@ -1,5 +1,10 @@
package be.digitalia.fosdem.utils;
import android.content.Context;
import android.content.Intent;
import android.os.Build;
import android.support.v4.content.LocalBroadcastManager;
import java.io.BufferedInputStream;
import java.io.IOException;
import java.io.InputStream;
@ -7,6 +12,7 @@ import java.net.HttpURLConnection;
import java.net.URL;
import java.security.cert.CertificateException;
import java.security.cert.X509Certificate;
import java.util.zip.GZIPInputStream;
import javax.net.ssl.HostnameVerifier;
import javax.net.ssl.HttpsURLConnection;
@ -15,11 +21,6 @@ import javax.net.ssl.SSLSession;
import javax.net.ssl.TrustManager;
import javax.net.ssl.X509TrustManager;
import android.content.Context;
import android.content.Intent;
import android.os.Build;
import android.support.v4.content.LocalBroadcastManager;
/**
* Utility class to perform HTTP requests.
*
@ -85,11 +86,14 @@ public class HttpUtils {
HttpURLConnection connection = (HttpURLConnection) url.openConnection();
connection.setReadTimeout(DEFAULT_TIMEOUT);
connection.setConnectTimeout(DEFAULT_TIMEOUT);
// We handle gzip manually to avoid EOFException bug in many Android versions when server returns HTTP 304
connection.addRequestProperty("Accept-Encoding", "gzip");
if (lastModified != null) {
connection.addRequestProperty("If-Modified-Since", lastModified);
}
connection.connect();
String contentEncoding = connection.getHeaderField("Content-Encoding");
result.lastModified = connection.getHeaderField("Last-Modified");
int responseCode = connection.getResponseCode();
@ -106,24 +110,26 @@ public class HttpUtils {
final int length = connection.getContentLength();
result.inputStream = new BufferedInputStream(connection.getInputStream());
if ((progressAction == null) || (length == -1)) {
// No progress support
return result;
if ((progressAction != null) && (length != -1)) {
// Broadcast the progression in percents, with a precision of 1/10 of the total file size
result.inputStream = new ByteCountInputStream(result.inputStream,
new ByteCountInputStream.ByteCountListener() {
private LocalBroadcastManager lbm = LocalBroadcastManager.getInstance(context);
@Override
public void onNewCount(int byteCount) {
// Cap percent to 100
int percent = (byteCount >= length) ? 100 : byteCount * 100 / length;
lbm.sendBroadcast(new Intent(progressAction).putExtra(progressExtra, percent));
}
}, length / 10);
}
// Broadcast the progression in percents, with a precision of 1/10 of the total file size
result.inputStream = new ByteCountInputStream(result.inputStream,
new ByteCountInputStream.ByteCountListener() {
private LocalBroadcastManager lbm = LocalBroadcastManager.getInstance(context);
@Override
public void onNewCount(int byteCount) {
// Cap percent to 100
int percent = (byteCount >= length) ? 100 : byteCount * 100 / length;
lbm.sendBroadcast(new Intent(progressAction).putExtra(progressExtra, percent));
}
}, length / 10);
if ("gzip".equals(contentEncoding)) {
result.inputStream = new GZIPInputStream(result.inputStream);
}
return result;
}
}